Twin Cam Camshaft Specs

[The Cyclist]

Friends

I've just got hold of three sets of camshafts fo a twin cam. I know about the engraved grooves to identify the standard cams, but at least one of the cam sets has been reprofiled (I think), so I want to find information on the net (ideally) about lift for common performance cams. I don't have the equipment to measure durations/ timings unless I fit the cam. So two questions:

Is there a website with twin cam technical data?

How much lift can you have before you need special springs/ other valve train mods?

I am not repeat not going racing.

Geoff
66 S3
72 TCS

[rgh0]

Geoff

In response to your 2 questions

I normally look at the various cam makers webs sites

i.e Elgin cams, Kent cams, Piper cams and the Dave Bean catalogue all
have a list of various performance profiles for the Twin Cam



You can typically fit a maximum of around .38 lift depending on the
various assembly tolerances of your valve gear and how original the
various components are.

Rohan

[Elan45]

A simpler thing to do would be to look over the cams in question for identifying marks. These will normally be stamped onto the end of the cams, more often the rear or maybe between the lobes somewhere. Then somene can tell you what the specs are for that profile.

Roger